Physics307L:People/Le/Notebook/070910: Difference between revisions
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(New page: --~~~~ ==Millikan Oil Drop Experiment== Used Millikan Oil Drop Apparatus by PASCO Scientific Model AP-8210 ===Setup=== The apparatus came pretty much ready to go. We made sure to level t...) |
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===Setup=== | ===Setup=== | ||
The apparatus came pretty much ready to go. We made sure to level the machine and calibrate it. | The apparatus came pretty much ready to go. We made sure to level the machine and calibrate it. | ||
For more details see [ftp://ftp.pasco.com/Support/Documents/English/AP/AP-8210/012-06123d.pdf Operations Maunal] | |||
*Calibration dealt with inserting a thin metal "needle" into the capacitor and adjusting the light | *Calibration dealt with inserting a thin metal "needle" into the capacitor and adjusting the light | ||
levels and focusing the microscope. | levels and focusing the microscope. | ||
| Line 17: | Line 17: | ||
thermistor to keep track of the resistance and temp (resistance falls as e^(-1/T)) http://en.wikipedia.org/wiki/Thermistor | thermistor to keep track of the resistance and temp (resistance falls as e^(-1/T)) http://en.wikipedia.org/wiki/Thermistor | ||
*Using Squibb's Mineral Oil (density 886kg/m^3) | *Using Squibb's Mineral Oil (density 886kg/m^3) | ||
===The Experiment=== | |||
*The capacitor has a small hole on the top of it, allowing us in insert oil droplets. With the housing and lid over the | |||
capacitor, spraying in the oil with an atomizer while keeping a very small hole on the bottom plate of the capacitor open, | |||
we should be able to get the air flowing out the bottom of the capacitor and the oil along with it | |||
*After getting some oil into the capacitor, we switch on | |||
Revision as of 22:41, 10 September 2007
--Linh N Le 01:38, 11 September 2007 (EDT)
Millikan Oil Drop Experiment
Used Millikan Oil Drop Apparatus by PASCO Scientific Model AP-8210
Setup
The apparatus came pretty much ready to go. We made sure to level the machine and calibrate it. For more details see Operations Maunal
- Calibration dealt with inserting a thin metal "needle" into the capacitor and adjusting the light
levels and focusing the microscope.
- A 500V power source was required to charge the capacitor, so we hooked one up and a digital multimeter
to keep thing accurate
- We had to measure the thikness of the spacer between the capacitor plates using a micrometer. Taking
several measurements we got: (in mm) 8.11 , 8.10 , 8.09 , 8.105 , 8.095
- Keeping track of the internal temperature was also crucial, so we attached another multimeter to a
thermistor to keep track of the resistance and temp (resistance falls as e^(-1/T)) http://en.wikipedia.org/wiki/Thermistor
- Using Squibb's Mineral Oil (density 886kg/m^3)
The Experiment
- The capacitor has a small hole on the top of it, allowing us in insert oil droplets. With the housing and lid over the
capacitor, spraying in the oil with an atomizer while keeping a very small hole on the bottom plate of the capacitor open, we should be able to get the air flowing out the bottom of the capacitor and the oil along with it
- After getting some oil into the capacitor, we switch on
